Table 2 English listening score with or without soundproof mattress (M) under various floor impact sound

with mattress

5.53 ± 1.46

6.00 ± 1.36

6.40 ± 1.68

5.80 ± 1.93

6.00 ± 1.56

6.33 ± 1.29

0.271

without mattress

6.73 ± 0.59

4.00 ± 2.20

6.40 ± 1.30

3.27 ± 1.67

5.20 ± 2.08

6.60 ± 0.91

<0.001

p-value^†

0.005

0.007

1.000

0.004

0.162

0.458